Models of catch per unit effort.

Log-linear negative binomial models (CPUE ~ time x area) were used to evaluate the explanatory power of terms “time” and “area” and a term for their interaction on estimated mean catch per unit effort (legal-sized fish encounters per vessel-day fishing effort). Model fit was assessed by calculating the Akaike Information Criteria (AIC) score for a null model and evaluating the change in AIC score (deltaAIC, ΔAIC) for a model with terms. An ANOVA model was used to determine if each model term was a significant effect. Models of catch per unit effort.